process_and_print_stl · MCP 3D Printer Server MCP

WHAT IT DOES

What process_and_print_stl does on MCP 3D Printer Server

AI agents invoke process_and_print_stl to trigger actions in MCP 3D Printer Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why process_and_print_stl needs a policy

This tool executes a complex workflow that results in physical printer operations. While not destructive in the sense of data deletion, it commits a 3D printer to a manufacturing process that consumes materials and time. Misuse could waste expensive materials or damage equipment.

From the tool's definition Tool description states it will 'start printing' and involves processing files through a physical device (3D printer). The tool chains multiple operations: 'extend base', 'slice it', 'confirm temperatures', and 'start printing'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

process_and_print_stl Rate-limited

process_and_print_stl stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "process_and_print_stl": {
      "limits": [
        {
          "counter": "process_and_print_stl_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP 3D Printer Server, so you can run agents against it safely.

FAQ

Questions about process_and_print_stl

What does the process_and_print_stl tool do? +

Process an STL file (extend base), slice it, confirm temperatures, and start printing. It is categorised as a Execute tool in the MCP 3D Printer Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on process_and_print_stl? +

Register the MCP 3D Printer Server MCP server in PolicyLayer and add a rule for process_and_print_stl: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MCP 3D Printer Server. Nothing to install.

What risk level is process_and_print_stl? +

process_and_print_stl is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit process_and_print_stl? +

Yes. Add a rate_limit block to the process_and_print_stl rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block process_and_print_stl completely? +

Set action: deny in the PolicyLayer policy for process_and_print_stl. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides process_and_print_stl? +

process_and_print_stl is provided by the MCP 3D Printer Server MCP server (mcpflow/dmontgomery40_mcp-3d-printer-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.